linux-kernel - drivers/ptp/ptp_ines.c:837:34: warning: unused variable 'ines_ptp_ctrl_of

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Date:   Tue, 27 Oct 2020 14:35:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: drivers/ptp/ptp_ines.c:837:34: warning: unused variable
 'ines_ptp_ctrl_of_match'

Hi Richard,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4525c8781ec0701ce824e8bd379ae1b129e26568
commit: bad1eaa6ac312ffd7aa46dd5a4d9843b824aa023 ptp: Add a driver for InES time stamping IP core.
date:   10 months ago
config: x86_64-randconfig-a014-20201027 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project f2c25c70791de95d2466e09b5b58fc37f6ccd7a4)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bad1eaa6ac312ffd7aa46dd5a4d9843b824aa023
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout bad1eaa6ac312ffd7aa46dd5a4d9843b824aa023
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/ptp/ptp_ines.c:481:37: warning: format specifies type 'unsigned char' but the argument has type 'int' [-Wformat]
                             tag_to_msgtype(ts->tag & 0x7), *msgtype & 0xf);
                                                            ^~~~~~~~~~~~~~
   include/linux/device.h:1792:47: note: expanded from macro 'dev_dbg'
                   dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
                                                       ~~~     ^~~~~~~~~~~
   drivers/ptp/ptp_ines.c:491:19: warning: format specifies type 'unsigned short' but the argument has type 'int' [-Wformat]
                             ts->portnum, ntohs(*portn));
                                          ^~~~~~~~~~~~~
   include/linux/device.h:1792:47: note: expanded from macro 'dev_dbg'
                   dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
                                                       ~~~     ^~~~~~~~~~~
   include/linux/byteorder/generic.h:142:18: note: expanded from macro 'ntohs'
   #define ntohs(x) ___ntohs(x)
                    ^~~~~~~~~~~
   include/linux/byteorder/generic.h:137:21: note: expanded from macro '___ntohs'
   #define ___ntohs(x) __be16_to_cpu(x)
                       ^~~~~~~~~~~~~~~~
   include/uapi/linux/byteorder/little_endian.h:42:26: note: expanded from macro '__be16_to_cpu'
   #define __be16_to_cpu(x) __swab16((__force __u16)(__be16)(x))
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/swab.h:104:2: note: expanded from macro '__swab16'
           (__builtin_constant_p((__u16)(x)) ?     \
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/ptp/ptp_ines.c:496:17: warning: format specifies type 'unsigned short' but the argument has type 'int' [-Wformat]
                             ts->seqid, ntohs(*seqid));
                                        ^~~~~~~~~~~~~
   include/linux/device.h:1792:47: note: expanded from macro 'dev_dbg'
                   dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
                                                       ~~~     ^~~~~~~~~~~
   include/linux/byteorder/generic.h:142:18: note: expanded from macro 'ntohs'
   #define ntohs(x) ___ntohs(x)
                    ^~~~~~~~~~~
   include/linux/byteorder/generic.h:137:21: note: expanded from macro '___ntohs'
   #define ___ntohs(x) __be16_to_cpu(x)
                       ^~~~~~~~~~~~~~~~
   include/uapi/linux/byteorder/little_endian.h:42:26: note: expanded from macro '__be16_to_cpu'
   #define __be16_to_cpu(x) __swab16((__force __u16)(__be16)(x))
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/uapi/linux/swab.h:104:2: note: expanded from macro '__swab16'
           (__builtin_constant_p((__u16)(x)) ?     \
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/ptp/ptp_ines.c:837:34: warning: unused variable 'ines_ptp_ctrl_of_match' [-Wunused-const-variable]
   static const struct of_device_id ines_ptp_ctrl_of_match[] = {
                                    ^
   4 warnings generated.

vim +/ines_ptp_ctrl_of_match +837 drivers/ptp/ptp_ines.c

   836	
 > 837	static const struct of_device_id ines_ptp_ctrl_of_match[] = {
   838		{ .compatible = "ines,ptp-ctrl" },
   839		{ }
   840	};
   841	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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